CN112550454B

CN112550454B - Bogie and rubber wheel train

Info

Publication number: CN112550454B
Application number: CN202011404882.XA
Authority: CN
Inventors: 肖遥; 门永林; 刘海兵; 虞名扬; 周庆; 张宗文
Original assignee: CRRC Nanjing Puzhen Co Ltd
Current assignee: CRRC Nanjing Puzhen Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2023-05-12
Anticipated expiration: 2040-12-04
Also published as: CN112550454A

Abstract

The embodiment of the application provides a bogie and rubber tyer train, wherein, the bogie includes: two axles; wheels capable of rotating relative to the axle are respectively arranged at two ends of the axle; two frame bodies extending along the direction perpendicular to the axles and positioned between the two axles; one end of the frame body is connected with an adjacent axle, and the other end of the frame body is hinged with the other frame body; the two frame bodies can rotate relatively in the horizontal plane; the suspension devices are symmetrically arranged on the axle; the top of the suspension device is used for being connected with the vehicle body; one end of the traction device is connected with the axle, and the other end of the traction device is connected with the vehicle body. The bogie and the rubber wheel train provided by the embodiment of the application have better curve passing capability and smaller turning radius.

Description

Bogie and rubber wheel train

Technical Field

The application relates to the technology of ground rubber-tyred vehicles, in particular to a bogie and a rubber-tyred train.

Background

At present, the transportation means in the city mainly comprise public transportation vehicles, rapid transit, sedans, subways, light rails and trams. The bus has the advantages of low cost, good visual field and the like when traveling, but has the problems of slow traveling caused by traffic jam, multiple transfer caused by line fixation and the like. The travel of the passenger car has the advantages of convenience, rapidness and the like, but with the gradual increase of the quantity of the passenger car in the city, serious traffic jam, difficult parking and serious environmental pollution become the problems which plague people for a long time and are to be solved urgently. The subway, the light rail and the tramcar adopt electric power as driving force to run along independent tracks, so that the problems of serious traffic jam, difficult parking and serious environmental pollution are solved, but the underground tunnel, the overground viaduct and the ground track are required to be built in the early stage, the construction period is long, the construction procedure is complex, the road space is required to be occupied in the construction process to bring inconvenience to the traveling of people, the tramcar also occupies a part of the road space during the operation, and more importantly, the construction cost is very high. The rapid transit has the advantages of rapidness, environmental protection, lower construction cost and the like, but a platform of the rapid transit still occupies a part of road space, and the coverage line of the rapid transit is limited.

Disclosure of Invention

In order to solve one of the technical defects, the embodiment of the application provides a bogie and a rubber wheel train.

According to a first aspect of embodiments of the present application, there is provided a bogie comprising:

two axles; wheels capable of rotating relative to the axle are respectively arranged at two ends of the axle;

two frame bodies extending along the direction perpendicular to the axles and positioned between the two axles; one end of the frame body is connected with an adjacent axle, and the other end of the frame body is hinged with the other frame body; the two frame bodies can rotate relatively in the horizontal plane;

the suspension devices are symmetrically arranged on the axle; the top of the suspension device is used for being connected with the vehicle body;

one end of the traction device is connected with the axle, and the other end of the traction device is connected with the vehicle body.

According to a second aspect of embodiments of the present application, there is provided a rubber tyer train comprising: at least two car bodies, between which the bogie as described above is connected

Adopt the technical scheme that provides in this application embodiment, adopt two axles that are connected with the wheel, set up two along the support body that extends of perpendicular to axle direction between two axles, the one end of support body links to each other with adjacent axle, and the other end is articulated with another support body, and two support bodies can be at the relative rotation of horizontal plane, drive two axles and deflect relatively, can reduce turning radius for the vehicle passes through curved ability better. In the embodiment, the suspension devices are symmetrically arranged on the axle and used for buffering the vertical force between the vehicle body and the bogie; one end of the traction device is connected with the axle, and the other end of the traction device is connected with the vehicle body and used for transmitting traction force and braking force between the vehicle body and the bogie.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a perspective view of a truck provided in an embodiment of the present application;

FIG. 2 is a top view of a truck provided in an embodiment of the present application;

fig. 3 is a perspective view of a bogie provided in an embodiment of the present application, where two frame body hinge portions are connected;

FIG. 4 is a top view of two frame hinges when the train is traveling straight;

FIG. 5 is a top view of two frame hinges as the train passes through the curve;

FIG. 6 is an exploded view of a truck body coupled to a slewing bearing in accordance with an embodiment of the present application;

FIG. 7 is a cross-sectional view of a slew bearing in a bogie provided in an embodiment of the present application;

FIG. 8 is a cross-sectional view of a slewing bearing in a bogie provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a slewing bearing cover plate according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a pivoting support cover plate according to an embodiment of the present disclosure;

fig. 11 is a schematic structural view of a bogie provided with a traction device according to an embodiment of the present application;

Fig. 12 is a schematic structural view of a traction device in a bogie according to an embodiment of the present application;

FIG. 13 is a front view of a drawbar in a truck provided in an embodiment of the present application;

FIG. 14 is a top view of a drawbar in a truck provided in an embodiment of the present application;

FIG. 15 is an end partial view of a drawbar in a truck provided in an embodiment of the present application;

FIG. 16 is a schematic view of an air spring mounting structure provided in an embodiment of the present application;

FIG. 17 is a schematic diagram of an air spring according to an embodiment of the present disclosure;

fig. 18 is a schematic structural view of a lifting assembly according to an embodiment of the present disclosure;

FIG. 19 is an exploded view of the steering drive and axle connection of the truck provided herein;

fig. 20 is a schematic structural view of a clamping device provided in the present application;

FIG. 21 is a view of the clamping device of FIG. 20 in use;

FIG. 22 is a schematic view of another clamping device provided in the present application;

FIG. 23 is a cross-sectional view of FIG. 22;

fig. 24 is a view showing a state of use of the chucking device shown in fig. 22.

Reference numerals:

1153-outboard body drawbar mount; 1154-inboard body drawbar mount;

41-a first frame; 411-first frame hinge; 412-a first frame connection; 413-a first bumper mount arm;

42-first axle; 4201—a first trailer wheel;

43-a second frame; 431-a second frame hinge; 432-a second frame connection; 433-a second bumper mount arm;

44-a second axle; 4401-second trailer wheel; 441-outboard axle drawbar mount; 442-inboard axle drawbar mount;

45-slewing bearing; 451-a slewing bearing; 4511—a first swivel; 4512-second swivel; 452-slewing support cover plate; 4521-through-passage stop tab; 4522-removable threaded hole; 4523-spring pin mounting holes; 4524-cover fastener mounting holes; 453-waterproof pad; 454-elastic pins; 455-sealing plugs; 456-a cover plate fastener;

46-a trailer traction device; 461-a first traction assembly; 4611—a first drawbar; 4612—first drawbar node; 4613—a height valve stem mount; 462-a second traction assembly; 4621—a second drawbar; 4622—a second drawbar node;

47-frame buffer means; 471-first buffer block mount; 472-first buffer block; 473-a second buffer block mount; 474-a second buffer block;

481-first steering drive; 4811-a first servo motor; 4812-a first power steering gear; 4813—a first coupling; 4814-a first power steering swing arm; 4815-a first track rod; 4816-a first trailer steering swing arm; 48161-first trailer swing arm; 48162-second trailer swing arm; 4817—a first tie rod; 4818-a first mount; 4819-a first limit switch; 482-a second steering drive; 4821-a second servomotor; 4822-a second power steering gear; 4823—a second coupling; 4824-a second power steering swing arm; 4825-a second track rod; 4826—a second trailer steering swing arm; 48261-third trailer sub-swing arm; 48262-fourth trailer sub-swing arm; 4827—a second tie rod; 4828-a second mount; 4829—a second limit switch;

49-an air spring; 491-spring top cover plate; 492-balloon; 493-a limit stop cover; 4931-a stop cover body; 4932-stop cover limiting plate; 4933-a stop cap mounting edge; 494-limit stops; 4941-a limit stop; 4942-limit stop tie rod; 495-slab rubber stack; 496-a limit stop mounting plate; 497-undersprung cover;

51-clamping means; 511-a first securing lever; 512-a second fixing rod; 513-a connecting rod; 514-a first boss; 515-a second boss; 516-a first stiffener; 517-a second reinforcing bar;

52-clamping device; 521-a first fixing rod; 522-a second securing lever; 523-fixed shaft; 524-first lock nut; 525-a second lock nut; 526-a first hanger plate; 527-second hanging plate.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application is given with reference to the accompanying drawings, and it is apparent that the described embodiments are only some of the embodiments of the present application and not exhaustive of all the embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

The embodiment provides a bogie which can be applied to a train, in particular to a train running on the ground. In this embodiment, the width direction of the train is referred to as the lateral direction, the length direction of the train is referred to as the longitudinal direction, and the direction perpendicular to the horizontal plane is referred to as the vertical or vertical direction.

Fig. 1 is a perspective view of a bogie provided in an embodiment of the present application, and fig. 2 is a top view of the bogie provided in an embodiment of the present application. As shown in fig. 1 and 2, the bogie provided in this embodiment includes: axle, support body, linkage and draw gear.

The number of the axles is two, and when the train runs in a straight line, the two axles are parallel to each other and extend along the width direction of the train; when the train turns through a curve, the end parts of the same side of the two axles are close to each other, and the end parts of the other side are far away from each other. The two ends of each axle are respectively provided with wheels which can rotate relative to the axles.

The number of the frame bodies is two, and the frame bodies extend along the direction vertical to the axles and are positioned between the two axles. One end of the frame body is connected with an adjacent axle, and the other end of the frame body is hinged with the other frame body; the two frame bodies can rotate relatively on the horizontal plane, and the two frame bodies rotate relatively to drive the axle to deflect.

The suspension devices are symmetrically arranged on the axles, specifically, the suspension devices are symmetrically arranged at two ends of the axles, and the suspension devices on the two axles are symmetrically arranged. The bottom of the suspension device is connected to the axle, and the top of the suspension device is used for being connected with the train body of the train and buffering the vertical force between the bogie and the train body.

One end of the traction device is connected with the axle, and the other end of the traction device is connected with the vehicle body and used for transmitting traction force and braking force between the bogie and the vehicle body.

The present embodiment provides a specific implementation manner, where the bogie is used as a trailer bogie and is connected between two adjacent vehicle bodies. As shown in fig. 1 and 2, two frames are referred to as a first frame 41 and a second frame 43, respectively, and two axles are referred to as a first axle 42 and a second axle 44, respectively. The first axle 42 and the second axle 44 are respectively connected to the bottoms of two adjacent vehicle bodies, and the first frame 41 and the second frame 43 rotate relatively, so that the turning of the train can be well adapted, and the turning radius can be reduced.

Specifically, both ends of the first frame 41 in the longitudinal direction are referred to as a first end and a second end, respectively, wherein the first end is hinged with the second frame 43, and the second end is connected with the first axle 42. First trailer wheels 4201 are connected to opposite ends of the first axle 42.

The two ends of the second bracket body 43 in the longitudinal direction are referred to as a first end for hinge-connecting with the first bracket body 41 and a second end connected with the second axle 44, respectively. A second trailer wheel 4401 is connected to each end of the second axle 44.

The hinge connection structure between the first frame 41 and the second frame 43 may be provided as needed, for example, the first end of the first frame 41 and the first end of the second frame 43 may be hinged by a shaft pin, and both may be rotated with respect to the shaft pin. Thus, when the first frame 41 or the second frame 43 rotates, the corresponding second frame 43 or the first frame 41 can follow rotation to a certain extent due to the hinged connection.

According to the technical scheme, two axles connected with wheels are adopted, two frame bodies extending along the direction perpendicular to the axles are arranged between the two axles, one end of each frame body is connected with an adjacent axle, the other end of each frame body is hinged with the other frame body, the two frame bodies can relatively rotate on a horizontal plane to drive the two axles to relatively deflect, turning radius can be reduced, and the ability of a vehicle to pass through curves is better. In the embodiment, the suspension devices are symmetrically arranged on the axle and used for buffering the vertical force between the vehicle body and the bogie; one end of the traction device is connected with the axle, and the other end of the traction device is connected with the vehicle body and used for transmitting traction force and braking force between the vehicle body and the bogie.

For the first frame and the second frame, this embodiment provides a specific implementation manner:

fig. 3 is a perspective view of connection between two frame body hinge parts in a bogie provided in an embodiment of the present application, fig. 4 is a top view of two frame body hinge parts when a train travels straight, fig. 5 is a top view of two frame body hinge parts when the train passes through a curve, fig. 6 is an exploded view of connection between a frame body and a slewing bearing device in the bogie provided in an embodiment of the present application, fig. 7 is a cross-sectional view of a slewing bearing in the bogie provided in an embodiment of the present application, fig. 8 is a cross-sectional view of a slewing bearing device in the bogie provided in an embodiment of the present application, fig. 9 is a schematic structural diagram one of a slewing bearing cover plate provided in an embodiment of the present application, and fig. 10 is a schematic structural diagram two of a slewing bearing cover plate provided in an embodiment of the present application.

As shown in fig. 1 to 10, a frame buffer device is provided on the frame, and the frame buffer device may be provided on at least one frame for buffering and stopping when the two frames are in rotational contact. The two frame bodies are connected through a rotary supporting device, and the rotary supporting device comprises a first rotating body and a second rotating body which can rotate in the horizontal plane, and the first rotating body and the second rotating body are respectively connected with the two frame bodies.

The support body includes: the frame body connecting part and the frame body hinging part. Wherein, the support body connecting portion is connected between axle and support body articulated portion, and the horizontal direction bilateral symmetry of support body articulated portion is provided with support body buffer. One end of the frame body hinge part far away from the frame body connecting part is connected with the first rotating body or the second rotating body.

The frame body is provided with a step hole and forms a step surface, the first rotating body and the second rotating body are arranged up and down, and the second rotating body is fixed on the step surface of one of the frame bodies. The bottom of the first rotating body is embedded in the second rotating body, and the top of the first rotating body protrudes out of the second rotating body and is fixed on the step surface of the other frame body.

In addition, the slewing bearing further includes: the rotary support cover plate is arranged on the frame body and seals the first step hole. A waterproof pad is arranged between the rotary support cover plate and the lower frame body, and an elastic pin extending along the vertical direction is arranged between the rotary support cover plate and the lower frame body and penetrates through the waterproof pad to be fixed to the frame body.

Specifically, the first frame 41 includes: a first frame hinge 411 and a first frame connection 412. Wherein, the first frame connecting portion 412 is connected between the first axle 42 and the first frame hinge portion 411. The second frame 43 includes: a second frame hinge portion 431 and a second frame connecting portion 432. Wherein the second frame connecting portion 432 is connected between the second axle 44 and the first frame hinge 411. The first frame hinge 411 and the second frame hinge 431 are connected by a swing support 45.

The slewing bearing 45 comprises a slewing bearing 451, the slewing bearing 451 comprises a first rotating body 4511 and a second rotating body 4512 which are in mutually rotating fit, and the rotating axes of the first rotating body 4511 and the second rotating body 4512 are perpendicular to the ground; the first rotating body 4511 may be connected to the first frame 41, and the second rotating body 4512 may be connected to the second frame 43, that is, the first frame 41 and the second frame 43 may be rotatably connected through the swivel bearing 451.

Specifically, the first frame 41 is fixedly connected with the first rotating body 4511 through a fastener, the first end of the first frame 41 is provided with a first step hole, the first step hole comprises a first aperture section and a second aperture section, the aperture of the first aperture section is larger than that of the second aperture section, a first step surface is formed at the transition connection part of the first aperture section and the second aperture section, and the first aperture section can be close to the first rotating body 4511 to enable the first rotating body 4511 to be installed below the first step surface.

Similarly, the second frame 43 is fixedly connected with the second rotating body 4512 through a fastener, the first end of the second frame 43 is provided with a second step hole, the second step hole comprises a third aperture section and a fourth aperture section, and the aperture of the third aperture section is larger than that of the fourth aperture section so as to form a second step surface at the transition connection position of the third aperture section and the fourth aperture section; the third aperture segment may be disposed proximate the second swivel 4512 such that the second swivel 4512 is secured above the second stepped surface.

In one embodiment, the first rotor 4511 and the second rotor 4512 are disposed up and down, and the rotation axes of the first rotor 4511 and the second rotor 4512 are perpendicular to the ground, or perpendicular to the first step surface, the second step surface; the first rotator 4511 comprises a first mounting surface and a bowl-shaped spherical surface structure protruding from the first mounting surface, wherein the upper bottom surface of the bowl-shaped spherical surface structure is fixed on the first mounting surface, and the lower bottom surface of the bowl-shaped spherical surface structure faces the second rotator 4512; the second swivel 4512 includes a second mounting surface and a second spherical aperture that mates with the bowl-shaped spherical structure, with the second spherical aperture facing the first swivel 4511.

The second mounting surface of the second swivel 4512 is attached to the second step surface, the second mounting surface and the second step surface are connected by bolts, and the second swivel 4512 is embedded in the second frame 43; the first mounting surface of the first rotating body 4511 is attached to the first step surface, the first mounting surface is connected with the first step surface through a bolt, a part of bowl-shaped spherical surface structure is inserted into the second spherical hole, the side surface of the bowl-shaped spherical surface structure is attached to the hole wall of the second spherical hole, a certain gap is formed between the first frame 41 and the second frame 43 in the vertical direction, and the bowl-shaped spherical surface structure can be biased in the inner side of the second spherical hole; i.e. the first swivel 4511 and the second swivel 4512 are not only rotatable about the axis of rotation, but also laterally deflectable.

In another embodiment, the first rotor 4511 and the second rotor 4512 are disposed up and down, the first rotor 4511 has a first mounting surface, and the first mounting surface is bonded and fixed to the first step surface; the second swivel 4512 has a second mounting surface, which is attached to and fixed to the second step surface; the second rotating body 4512 is provided with a bowl-shaped spherical structure, the first rotating body 4511 is provided with a first spherical hole matched with the bowl-shaped spherical structure, the side surface of the bowl-shaped spherical structure is attached to the side wall of the first spherical hole, a certain gap is formed between the first frame 41 and the second frame 43 in the vertical direction, and the bowl-shaped spherical structure can be biased in the inner side of the first spherical hole, namely, the first rotating body 4511 and the second rotating body 4512 can rotate around a rotation axis and can laterally deflect.

The first rotor 4511 and the second rotor 4512 are disposed up and down in the present embodiment, and the rotation axes of the first rotor 4511 and the second rotor 4512 are perpendicular to the ground, or perpendicular to the first step surface and the second step surface; the second mounting surface of the second swivel 4512 is attached to the second step surface, the second mounting surface and the second step surface are connected by bolts, and the second swivel 4512 is embedded in the second frame 43; the first mounting surface of the first rotating body 4511 is attached to the first step surface, the first mounting surface is connected with the first step surface through bolts, and a certain floating gap is formed between the first frame 41 and the second frame 43, so that certain lateral deflection capability is achieved in the process of rotating the first rotating body 4511 and the second rotating body 4512 around a rotation axis, and the curve passing performance and the adaptability of a vehicle can be improved.

In this embodiment, a rotary support cover plate 452 is further disposed above the first frame 41, where the rotary support cover plate 452 is used to seal the first step hole of the first frame 41; the rotary support cover 452 may be a circular plate, the rotary support cover 452 is disposed at a first end of the first frame 41, and the rotary support cover 452 is attached to and fixed on a surface of the first frame 41, for sealing the first step hole. For example, the swing support cover 452 is provided at the first stepped hole and is fixed to the first frame 41. With this arrangement, dust, foreign matter, rainwater, etc. can be prevented from entering the slewing bearing, and the reliability of the slewing bearing device 45 can be improved.

Two through channel limiting bosses 4521 are arranged on one side of the rotary support cover plate 452 away from the first frame 41, and the two through channel limiting bosses 4521 are arranged on the rotary support cover plate 452 at intervals and protrude out of the surface of the rotary support cover plate 452 so as to form a limiting space of a through channel.

The through channel is a channel connected between two car bodies, the bogie is connected between the two car bodies, and the rotary support cover plate 452 is positioned below the through channel. A through passage limiting block is arranged on the bottom surface of the through passage facing the rotary support cover plate 452, and the through passage limiting block can be embedded in the limiting space. The through channel limiting block is limited between the two through channel limiting bosses 4521, and the through channel limiting bosses 4521 can limit the deformation and the rotation angle of the through channel.

For example, two through-channel limiting bosses 4521 may be disposed in a central region of the slewing bearing cover 452 and symmetrically disposed on the slewing bearing cover 452. The rotary support cover plate 452 may be a circular rotary support cover plate 452, two through channel limiting bosses 4521 are symmetrically arranged along the center of the rotary support cover plate 452, a certain interval is provided between the two through channel limiting bosses 4521, and an insertion space for a through channel limiting block is formed between the two through channel limiting bosses; along the length direction of the bogie, two through channel limiting bosses 4521 are respectively positioned at the left side and the right side of the through channel limiting block, and can limit the deformation and the rotation angle of the through channel and prevent the deformation and the rotation angle of the through channel from being overlarge.

On the basis of the above embodiment, an annular waterproof pad 453 is further disposed between the slewing bearing cover 452 and the first frame 41, so that external water can be prevented from entering the slewing bearing 451, corrosion of the slewing bearing 451 due to water entering is avoided, and the rotation reliability of the first frame 41 and the second frame 43 is improved.

Specifically, the rotary support cover plate 452 is provided with a sinking platform towards one side of the first frame 41 to form an installation space of the waterproof pad 453, the waterproof pad 453 is arranged around the second step hole, one side of the waterproof pad 453 is in butt joint with the rotary support cover plate 452, the other side of the waterproof pad 453 is in butt joint with the first frame 41, the free thickness of the waterproof pad 453 is larger than the depth of the sinking platform, the waterproof pad 453 is in a compressed state after being installed, and the waterproof effect between the rotary support cover plate 452 and the first frame 41 can be improved through compressing the waterproof pad 453.

Further, the swing support cover 452 is secured to the first frame 41 by a plurality of cover fasteners 456. For example, a plurality of cover fasteners 456 are equally spaced along the circumferential direction of the swing support cover 452, and the first frame 41 is provided with cover fastener mounting holes 4524 that mate with the cover fasteners 456; the cover fastener 456 may be a fastening bolt, and the cover fastener installation hole 4524 provided in the first frame body 41 may be a screw hole, and one end of the cover fastener 456 passes through the gasket, the swing support cover 452, and is fixed to the first frame body 41, thereby fixing the swing support cover 452 to the first frame body 41.

On the basis of the above embodiment, the cover fastening member 456 may be disposed opposite to the waterproof pad 453 to improve the waterproof effect between the first frame 41 and the swing support cover 452; for example, the waterproof pad 453 is disposed opposite to the cover fastening member 456, and the waterproof pad 453 is provided with a through hole through which the cover fastening member 456 passes, i.e., one end of the cover fastening member 456 passes through the swing support cover 452, the waterproof pad 453, and is fixed to the first frame 41, thereby enhancing the waterproof effect between the swing support cover 452 and the first frame 41.

When the revolving support cover 452 receives an impact force from the through passage, in order to prevent the cover fastener 456 from being broken due to the impact force, an elastic pin 454 is further provided between the revolving support cover 452 and the first frame 41 in this embodiment, and the elastic pin 454 is used for resisting the impact force from the through passage to the revolving support cover 452. Specifically, two elastic pins 454 are disposed between the rotary support cover 452 and the first frame 41, the two elastic pins 454 are respectively located at the outer sides of the two through-channel limiting bosses 4521 away from the through-channel, and the elastic pins 454 are disposed opposite to the through-channel limiting bosses 4521. For example, the slewing bearing cover 452 is provided with two elastic pin mounting holes 4523, two through-channel limiting bosses 4521 are located between the two elastic pin mounting holes 4523, and an elastic pin 454 is inserted into the elastic pin mounting holes 4523 and fixed on the first frame 41; the impact force received by the through channel limiting boss 4521 can be transmitted to the elastic pin 454 along a straight line, so that the counteracting effect of the impact force is improved.

Further, the elastic pin 454 may be disposed opposite to the waterproof pad 453, the waterproof pad 453 is provided with a through hole through which the elastic pin 454 passes, and one end of the elastic pin 454 passes through the slewing bearing cover 452 and the waterproof pad 453 and is inserted into the first frame 41. With this arrangement, the waterproof effect of the waterproof pad 453 to the swing support cover 452 and the first frame 41 can be improved.

In addition to the above embodiment, in this embodiment, the swivel support cover 452 is further provided with a dismounting screw hole 4522 and a seal plug 455 for sealing the dismounting screw hole 4522, and the dismounting screw hole 4522 penetrates the swivel support cover 452. When the rotary support cover plate 452 needs to be disassembled, the sealing plug 455 is disassembled from the disassembling threaded hole 4522, so that one end of the disassembling threaded hole 4522 is opened, a tool bolt is suspended into the disassembling threaded hole 4522, the end of the tool bolt is abutted against the first frame 41, and an external force is applied to the tool bolt so as to separate the rotary support cover plate 452 from the first frame 41; accordingly, when the swing support cover 452 is not required to be disassembled, the sealing plug 455 is installed in the withdrawal threaded hole 4522 and seals the withdrawal threaded hole 4522.

Two frame body buffer devices are arranged on the frame body, the two frame body buffer devices are symmetrically arranged on two sides of the frame body, and the symmetry axis is perpendicular to the axle. The frame body buffer device includes: buffer block mount pad and buffer block. Wherein, the buffer block mount pad is fixed on the support body. The buffer block is fixed on the buffer block mounting seat. Buffer blocks on the same side of the two frame bodies are arranged in opposite directions. When the two axles are parallel, the buffer blocks positioned between the same sides of the two frame bodies are not contacted; when the two frames rotate relative to each other by a preset angle, the buffer blocks on the same side of the two frames with the rotation direction can be abutted.

One implementation is as follows: the buffer seat installation arms extend outwards from two sides of the frame body and are used for installing the buffer block installation seats, and a preset included angle is formed between the buffer seat installation arms and the extending direction of the frame body.

Specifically, along the direction from the first axle 42 to the second axle 44, the first ends of the first frame 41 are symmetrically provided with two frame buffer devices 47, respectively, and the first ends of the second frame 43 are symmetrically provided with two frame buffer devices 47, respectively. For convenience of description, the frame buffer 47 provided at the first frame 41 may be defined as a first frame buffer, and the frame buffer 47 provided at the second frame 43 may be defined as a second frame buffer.

The first frame buffer device and the second frame buffer device are matched, and when the first frame 41 and the second frame 43 rotate by a certain angle, the first frame buffer device and the second frame buffer device can be abutted. Further, the first frame buffer device and the second frame buffer device located at the same side may be located on the same rotation path. When the first frame 41 and the second frame 43 relatively rotate, the gap between the first frame buffer device and the second frame buffer device gradually decreases until the first frame buffer device and the second frame buffer device are contacted, and buffer force is provided for the first frame 41 and the second frame 43, so that the first frame 41 and the second frame 43 are prevented from rigidly contacting; continuing to extrude, the first frame buffer device and the second frame buffer device are not elastically deformed any more, and the first frame 41 and the second frame 43 can be limited, so that the purpose of rigidity limitation is achieved, and the rotation angle between the first frame 41 and the second frame 43 is limited.

In one embodiment, the first frame buffer device includes a first buffer block 472 and a first buffer block mount 471, the first buffer block mount 471 being used for mounting the first buffer block 472, the first buffer block mount 471 being mounted to the first frame 41 by the first buffer block mount arm 413. It can be understood that the first frame buffer device is a part formed by compounding a buffer block made of rubber and a metal mounting seat together through a certain process, wherein the metal mounting seat is used for being fixedly connected with the first buffer seat mounting arm 413, and the rubber buffer block is suspended and used as buffer.

The first buffer seat mounting arm 413 may be an arc-shaped blocking arm, and the bending extension direction of the arc-shaped blocking arm is consistent with the rotation direction of the first frame 41, one end of the first buffer seat mounting arm 413 is fixedly connected with the first frame 41, and the other end of the first buffer seat mounting arm 413 is fixedly provided with a first buffer block mounting seat 471.

Similarly, the second frame buffer device includes a second buffer block 474 and a second buffer block mounting seat 473, where the second frame buffer device is mounted on the second frame 43 by a second buffer seat mounting arm 433, and the structure of the second buffer seat mounting arm 433 can be set with reference to the structure of the first buffer seat mounting arm 413, which is not described herein.

Preferably, when the first frame buffer device and the second frame buffer device are in contact, the first buffer block 472 and the second buffer block 474 can be in front contact, and the first buffer block 472 is opposite to the second rubber, so as to provide the maximum buffer force for the first frame buffer device and the second frame buffer device, and reduce vibration and noise generated by impact during the rotation of the first frame 41 and the second frame 43.

On the basis of the above embodiment, the first frame 41 and the second frame 43 provided in this embodiment are respectively in a split structure, where the first frame 41 includes a first frame connecting portion 412 connected to the first axle 42, and a first frame hinge portion 411 connected to the first frame connecting portion 412; the first frame connecting portion 412 is fixedly connected with the first axle 42, or the first frame connecting portion 412 and the first axle 42 may be manufactured as an integral structure.

One end of the first frame hinge part 411 is fixedly connected with the first frame connecting part 412 by bolts, and the other end of the first frame hinge part 411 is connected with the first rotor 4511 of the swivel bearing 451. The two sides of the first frame body hinge part 411 are also respectively provided with a first buffer seat mounting arm 413, and the first buffer seat mounting arm 413 and the first frame body hinge part 411 can form an integrated structure so as to enhance the connection strength of the first buffer seat mounting arm 413 and the first frame body hinge part 411.

Similarly, the second frame 43 includes a second frame connecting portion 432 connected to the second axle 44, and a second frame hinge portion 431 connected to the second frame connecting portion 432, where the second frame connecting portion 432 is fixedly connected to the second axle 44, or the second frame connecting portion 432 and the second axle 44 may be manufactured as an integral structure; one end of the second frame connection part 432 is fixedly connected to the second frame hinge part 431 by a bolt, and the other end of the second frame hinge part 431 is connected to the second swivel 4512 of the swivel bearing 451. The two sides of the second frame body hinge portion 431 are further provided with second buffer seat mounting arms 433 respectively, and the second buffer seat mounting arms 433 and the second frame body hinge portion 431 can form an integrated structure so as to enhance the connection strength of the second buffer block mounting seat 473 and the second frame body hinge portion 431.

In order to raise the rotation angles of the first frame 41 and the second frame 43, the width of one end of the corresponding frame hinge portion, which is connected to the frame connecting portion, is greater than that of one end of the other frame hinge portion, and the width of the frame hinge portion is gradually reduced along the direction from the axle to the frame hinge portion. Specifically, the first frame 41 and the second frame 43 are integrally in a triangle structure or a trapezoid structure, the second end of the first frame 41 is connected with the first axle 42, the first end is connected with the revolving bearing 451, the second end of the second frame 43 is connected with the second axle 44, and the first end of the second frame 43 is connected with the revolving bearing 451, so that a larger rotation space is formed by the first frame 41 and the second frame 43 near one end of the revolving bearing 451, and the rotation angle requirements of the first frame 41 and the second frame 43 are met.

On the basis of the above embodiment, the first frame 41 and the second frame 43 are further provided with hollow structures, so as to reduce the weight of the first frame 41 and the second frame 43. Specifically, the first frame body connection portion 412 and the first frame body hinge portion 411 of the first frame body 41 are respectively provided with a hollow structure, and specifically, the first frame body hinge portion is provided with a plurality of through holes penetrating up and down to form the hollow structure. The side wall of the through hole facing the frame body connecting part is provided with a bolt hole with a central line extending along the horizontal direction so as to be connected with the frame body connecting part through the bolt hole by a bolt. For example, the first frame connecting portion 412 may be provided with a first hollow structure, where the first hollow structure includes two trapezoidal holes or square holes symmetrically disposed on the first frame connecting portion 412; the number of the trapezoid or square holes in the hollowed-out structure is related to the arrangement of the connecting bolts, and the uniformly arranged trapezoid holes and square holes are beneficial to the uniform transmission of stress; the size of the hollowed-out space fully considers the bolt installation and fastening operation space. The trapezoid and square are adopted as the hollow structure, the change of the sizes of the two ends of connection is fully considered, gradual transition is achieved, and stress concentration is avoided.

The first frame body hinge part 411 may be provided with a second hollow structure, where the second hollow structure includes a plurality of elongated holes, and the plurality of elongated holes may be symmetrically disposed on the first frame body hinge part 411; the extending direction of the elongated hole is parallel to the extending direction of the first frame hinge 411, so that the elongated hole is consistent with the arrangement direction of the bolts, and consistent with the longitudinal stress direction such as larger traction force, braking force and the like, so that the bolts are stressed.

Further, the second frame connecting portion 432 and the second frame hinge portion 431 of the second frame 43 are provided with hollow structures; for example, the second frame connecting portion 432 may be provided with a third hollow structure, and the third hollow structure may be provided with reference to the first hollow structure; the second frame hinge portion 431 may be provided with a fourth hollow structure, and the fourth hollow structure may be set with reference to the second hollow structure, which is not described herein.

The frame body connecting part is of a trapezoid structure, the long bottom edge of the frame body connecting part is connected with the axle, and the short bottom edge of the frame body connecting part is connected with the frame body hinging part. The structures of the first frame body connecting part and the second frame body connecting part can be the trapezoid structures. The connection part between the frame body connection part and the frame body hinge part can be properly widened, and the connection strength is improved.

The axle includes: a middle bridge section extending along the horizontal direction and end bridge sections formed by extending upwards from two ends of the middle bridge section along the vertical direction; the end bridge section is connected with the wheels, and a suspension device is arranged on the end bridge section. The height of the middle bridge section is equal to the height of the frame body, the height of the bottom plate of the through channel between the two vehicle bodies is equal to the height of the floor of the vehicle body, and the bottom end of the through channel falls on the frame body. The structure of the axle and the frame body can be suitable for a through passage with lower height and a low floor vehicle body. The first axle 42 and the second axle 44 are of the same construction.

The embodiment provides an implementation manner of a traction device: the traction device comprises: and one end of each first traction component is connected to the two end bridge sections of the axle, and the other end of each first traction component is connected with the vehicle body. The first traction assembly is used to transfer longitudinal traction and longitudinal forces between the vehicle body and the truck.

Further, the traction device further includes: the two second traction components are respectively connected to the middle axle section of the axle, and each second traction component is provided with a first end and a second end along the length direction of the second traction component, wherein the first end is connected with the middle axle section, and the second end is used for being connected with the vehicle body. The distance between the first ends of the two second traction components is smaller than the distance between the second ends, which is equivalent to the fact that the two second traction components extend outwards in a splayed shape. The second traction assembly not only can be used for transmitting longitudinal traction force and longitudinal force between the vehicle body and the bogie, but also can be used for transmitting transverse force between the vehicle body and the bogie, so that the stability of turning of the vehicle can be improved.

The traction devices are symmetrically arranged on the first axle 42 and the second axle 44, and are respectively connected to the two vehicle bodies. The truck described above may be used as a trailer truck, and the towing means will be referred to hereinafter as a trailer towing means.

Fig. 11 is a schematic structural view of a bogie provided with a traction device according to an embodiment of the present application, and fig. 12 is a schematic structural view of a traction device in a bogie according to an embodiment of the present application. As shown in fig. 11 and 12, this embodiment provides a specific implementation manner:

the trailer traction device 46 is arranged on a side of the first axle 42 facing away from the first frame body 41 and on a side of the second axle 44 facing away from the second frame body 43. The trailer hitch 46 of this embodiment includes two first hitch assemblies 461 and two second hitch assemblies 462.

The second axle 44 has an outer axle drawbar seat 441 disposed on each of its end axle segments, and two inner axle drawbar seats 442 disposed on its intermediate axle segment, the inner axle drawbar seats 442 being disposed obliquely toward the outer axle drawbar seat 441 adjacent thereto.

Correspondingly, two outer vehicle body traction rod seats 1153 and two inner vehicle body traction rod seats 1154 are arranged on the vehicle body, the inner vehicle body traction rod seats 1154 are positioned between the two outer vehicle body traction rod seats 1153, and the inner vehicle body traction rod seats 1154 are obliquely arranged away from the adjacent outer vehicle body traction rod seats 1153.

Wherein the ends of the first traction assembly 461 are respectively configured to connect an outboard axle drawbar mount 441 and an outboard body drawbar mount 1153. The two first traction members 461 are parallel to each other and extend in the longitudinal direction.

The second traction assembly 462 has opposite ends for connecting the inboard axle drawbar mount 442 and the inboard body drawbar mount 1154, respectively. The two second traction assemblies 462 are disposed at an incline, and the first ends of the two second traction assemblies 462 connected to the axle are located between the second ends of the two second traction assemblies 462 connected to the vehicle body, such that the two second traction assemblies 462 are generally "eight" shaped after connection.

By the above arrangement, the two first traction assemblies 461 and the two second traction assemblies 462 together transmit traction and braking forces between the trailer bogie 4 and the vehicle body to which they are connected, reducing the load on each traction assembly while evenly distributing traction and braking forces over the entire vehicle body frame and the trailer bogie 4, avoiding stress concentrations. Moreover, the second traction assembly 462 also enables the transfer of lateral forces between the vehicle body and the truck, improving stability during cornering of the vehicle.

Meanwhile, the height of the two first traction components 461 and the height of the center of the wheel can be kept consistent, so that loss in traction and braking force transmission is reduced, and the wheel load shedding rate is also reduced; the two second traction assemblies 462 can ensure smooth transfer of traction and braking forces as the vehicle passes through small curves, improving transfer efficiency.

Optionally, the angle between the second traction assembly 462 and the axle is 30 ° -40 °, and the angle between the second traction assembly 462 and the vehicle body end face is 30 ° -40 °, in which range a high transmission efficiency of the second traction assembly 462 is maintained.

Optionally, the first traction assembly 461 of the present embodiment includes a first traction rod 4611 and two first traction rod nodes 4612, wherein the two ends of the first traction rod 4611 are respectively provided with a first traction rod through hole, the axial direction of the first traction rod through hole is perpendicular to the axial direction of the first traction rod 4611, the first traction rod nodes 4612 are fixedly connected in the first traction rod through holes, that is, one end of the first traction rod node 4612 passes through the first traction rod through holes and then the middle part of the end of the first traction rod node is fixed with the first traction rod through holes. The first drawbar node 4612 is located at two sides of the first drawbar through hole and is used for connecting the outer axle drawbar seat 441 or the outer vehicle body drawbar seat 1153, and a specific connection manner may be selected from a bolting connection manner, a hinging connection manner, and the like.

The second traction assembly 462 includes a second traction rod 4621 and two second traction rod nodes 4622, two ends of the second traction rod 4621 are respectively provided with a second traction rod through hole, an axial direction of the second traction rod through hole is perpendicular to an axial direction of the second traction rod 4621, the second traction rod nodes 4622 are fixedly connected in the second traction rod through holes, that is, one end of the second traction rod node 4622 passes through the second traction rod through holes, and then the middle part of the second traction rod node is fixed with the second traction rod through holes. The second drawbar node 4622 is located at two sides of the second drawbar through hole and is used for connecting the inner axle drawbar seat 442 or the inner vehicle body drawbar seat 1154, and a specific connection manner may be selected from a bolting connection manner, a hinging connection manner, and the like.

Preferably, the first connecting hole for connecting the outer axle drawbar seat 441 or the outer vehicle body drawbar seat 1153 is disposed on two sides of the first drawbar node 4612 located on the first drawbar through hole, and the first fastener passes through the first connecting hole and is then fixed on the outer axle drawbar seat 441 or the outer vehicle body drawbar seat 1153. The first connecting hole may be a through hole, the first fastening member may be a bolt, and the outer axle drawbar seat 441 and the outer vehicle body drawbar seat 1153 are provided with threaded fixing holes adapted to the first fastening member, and the first fastening member may pass through the first connecting hole and be fixed in the threaded fixing holes.

The second drawbar node 4622 is provided with a second connecting hole on both sides of the second drawbar through hole for connecting the inner axle drawbar seat 442 or the inner vehicle body drawbar seat 1154, and the second fastener passes through the second connecting hole and is fixed on the inner axle drawbar seat 442 or the inner vehicle body drawbar seat 1154. The second connecting hole may be a through hole, the second fastening member may be a bolt, and threaded fixing holes adapted to the second fastening member are formed on the inner axle drawbar seat 442 and the inner vehicle body drawbar seat 1154, and the second fastening member may pass through the first connecting hole and be fixed in the threaded fixing holes.

In this embodiment, the mode of adopting bolted connection can make things convenient for the installation and the dismantlement of traction assembly to follow-up maintenance and maintenance of being convenient for.

Further, the first traction assembly 461 of the present embodiment further includes a height valve stem mounting seat 4613, and the height valve stem mounting seat 4613 is used for mounting a height valve stem to implement an air spring adjusting function in a limited space.

The height valve stem mount 4613 is located on a side of the first traction lever 4611 facing the first axle 42, and the height valve stem mount 4613 is fixedly coupled to a side of the first traction lever node 4612 facing the second traction assembly 462.

Specifically, the height valve rod mounting seat 4613 of this embodiment includes a first plate and a second plate that are perpendicular to each other, where the first plate is provided with a first fixing hole adapted to the first connecting hole, and the second plate is used for mounting the height valve rod. The first flat plate and the second flat plate can be formed by bending the same steel plate, and rib plates can be welded between the first flat plate and the second flat plate to increase the connection strength.

Fig. 13 is a front view of a traction rod in a bogie provided in an embodiment of the present application, fig. 14 is a top view of the traction rod in the bogie provided in an embodiment of the present application, and fig. 15 is an end partial view of the traction rod in the bogie provided in an embodiment of the present application. As shown in fig. 13 to 15, the first and second drawbar through holes in the present embodiment are all of oblong structures, so as to increase the strength of the joint of the drawbar node and the drawbar. Taking the first traction rod 4611 as an example, the radius corresponding to the first traction rod through hole is R1, and the long round structure refers to that one end of the first traction rod 4611 covering the first traction rod through hole is formed by two semicircular structures with radius of R2 and a horizontal part with length of L connecting the two semicircular structures, wherein a distance of L/2 is between a circle center corresponding to the semicircular structure and a circle center of the first traction rod through hole.

Further, in this embodiment, both ends of the first traction bar 4611 and the second traction bar 4621 are provided with chamfers to avoid interference with the vehicle body or the trailer bogie 4 during operation.

Preferably, the first traction rod 4611 is a metal rod, and the first traction rod node 4612 includes a metal portion and a rubber portion, and the metal portion and the rubber portion are integrally vulcanization molded; the second drawbar 4621 is a metal bar and the second drawbar node 4622 includes a metal portion and a rubber portion, the metal portion being integrally vulcanization molded with the rubber portion.

The traction rods of the embodiment are all formed by forging and machining alloy steel materials, and are high in strength and good in toughness; the traction rod node is formed by vulcanizing metal and rubber, can buffer impact during traction and braking, is suitable for relative movement between the vehicle body and the bogie, and simultaneously, can buffer impact during traction and braking, and optimize stress conditions of the vehicle body and the bogie.

On the basis of the above technical solution, this embodiment provides an implementation manner of a suspension device:

fig. 16 is a schematic diagram of an air spring mounting structure provided in an embodiment of the present application, fig. 17 is a schematic diagram of an air spring structure provided in an embodiment of the present application, and fig. 18 is a schematic diagram of a lifting assembly provided in an embodiment of the present application.

As shown in fig. 16 to 18, the suspension device is an air spring 49, and the air spring 49 includes a spring upper cover 491, an air bag 492, a flat rubber stack 495, and a lifting assembly. Wherein, spring upper cover 491, gasbag 492 and dull and stereotyped rubber heap 495 are set gradually from top to bottom, and spring upper cover 491 is located air spring 49's top, and it not only is used for with automobile body fixed connection, but also can separate gasbag 492 and automobile body, reduces the risk that gasbag 492 leads to damaging because of the direct connection in the bottom of automobile body.

The top of the air bag 492 is connected with the sprung top cover plate 491 in a sealing way, the bottom of the air bag 492 is enclosed around the top of the flat rubber stack 495, and the air bag 492 is connected with the flat rubber stack 495 in a sealing way, namely, the air bag 492, the sprung top cover plate 491 and the flat rubber stack 495 enclose a sealing cavity, and air can be injected into the air bag 492 or released to adjust the elasticity of the air spring 49.

The lifting assembly is arranged in the sealed cavity and can be used as a lifting device between the vehicle body and the framework. The lifting assembly comprises a limit stop cover 493 and a limit stop 494, wherein the bottom of the limit stop cover 493 is covered and fixed on the flat rubber stack 495, and a gap is kept between the top of the limit stop cover 493 and the spring upper cover 491 so as to enable the vehicle body to vibrate up and down in operation. The limit stopper 494 comprises a limit stopper 4941 and a limit stopper connecting rod 4942, a through hole is arranged at the top of the limit stopper cover 493, and the through hole is in clearance fit with the limit stopper connecting rod 4942; one end of the limit stop connecting rod 4942 passes through the through hole to be connected with the spring upper cover plate 491, and the other end of the limit stop connecting rod 4942 extends into the limit stop cover 493 and is connected with the limit stop block 4941 positioned in the limit stop cover 493; if the limit stop connecting rod 4942 has a force for lifting or lowering the limit stop connecting rod, the limit stop block 4941 can move up and down in the limit stop cover 493.

The gap between the top of the limit stop cover 493 and the sprung top cover 491, the gap between the top of the limit stop cover 493 and the limit stop block 4941 needs to be larger than the vertical maximum displacement in the normal operation of the vehicle, and the gap between the limit stop block 4941 and the flat rubber stack 495 needs to be larger than the gap between the top of the limit stop cover 493 and the sprung top cover 491, so that the contact between the limit stop block 4941 and the flat rubber stack 495 is avoided in the normal operation of the air spring.

When the limit stop connecting rod 4942 has the upward acting force, the limit stop block 4941 moves upwards in the limit stop cover 493, and the limit stop block 4941 can be abutted to the top of the limit stop cover 493 so as to transfer the acting force to the limit stop cover 493, and the acting force is transferred to the flat rubber stack 495 through the limit stop cover 493, so that the framework under the vehicle body can be lifted together with the vehicle body.

The air spring 49 provided in this embodiment sets the lifting assembly in the sealed cavity surrounded by the air bag 492, the spring upper cover plate 491 and the flat rubber stack 495, not only makes the air spring 49 have a vibration reduction function, but also uses the lifting assembly to connect the vehicle body with the flat rubber stack 495 in the air spring 49, and then connects the frame connected with the flat rubber stack 495 with the vehicle body, thereby realizing that a lifting device is arranged between the vehicle body and the frame, and further lifting the frame under the vehicle body along with the vehicle body.

On the basis of the above embodiment, the air spring 49 further includes a limit stop mounting plate 496, and the limit stop mounting plate 496 may be a rectangular plate. The limit stop mounting plate 496 is fixed on one side of the upper spring cover plate 491 facing the limit stop cover 493, the limit stop mounting plate 496 can be fixed on the upper spring cover plate 491 through bolts, and a gap is reserved between the limit stop mounting plate 496 and the limit stop cover 493 so as to meet the requirement of up-and-down vibration in the running of the vehicle body.

The limit stop mounting plate 496 may be used to fix the limit stop connecting rod 4942, where the limit stop mounting plate 496 is provided with a threaded hole, and an end of the limit stop connecting rod 4942 extending out of the limit stop cover 493 is threaded into the threaded hole, so as to fix the limit stop connecting rod 4942 to the limit stop mounting plate 496.

Further, the other end of the limit stop connecting rod 4942 extends into the limit stop cover 493, and one end of the limit stop connecting rod 4942 located in the limit stop cover 493 is connected with the limit stop 4941 located in the limit stop cover 493. The limit stop cover 493 includes a stop cover body 4931, stop cover limit plates 4932 at two ends of the stop cover body 4931, and a stop cover mounting edge 4933; wherein, the bottom of the stop cover 4931 is provided with an opening, the opening is relatively arranged on the flat rubber stack 495, and the end surface of the opening is attached to the surface of the flat rubber stack 495, so that when the stop block 4941 moves vertically in the stop cover 493, the stop block 4941 passes through the opening and can be abutted to the flat rubber stack 495, so as to limit the stop block 4941, thereby limiting the oversized vertical downward displacement of the vehicle body and improving the driving safety of the vehicle.

A stopper cover mounting edge 4933 is provided along the circumferential direction of the bottom end opening of the stopper cover body 4931, the stopper cover mounting edge 4933 being located outside the stopper cover body 4931; the stopper cap mounting edge 4933 is used to secure the stopper cap body 4931 to the flat sheet rubber stack 495. For example, the stopper cover mounting edge 4933 may be formed by folding the bottom end of the stopper cover body 4931 outward, and the stopper cover mounting edge 4933 is provided with a bolt and is fixed on the flat rubber stack 495 by the bolt, so that the flat rubber stack 495 is attached and fixed with the stopper cover mounting edge 4933.

The top end of the stop cover 4931 is provided with a stop cover limiting plate 4932, and the stop cover limiting plate 4932 can be regarded as a bottom plate of the stop cover 4931, i.e. the stop cover 4931 and the stop cover limiting plate 4932 are of an integrated structure; or, the top end of the stop cover body 4931 is provided with an opening, and a stop cover limiting plate 4932 for blocking the opening is arranged; in this embodiment, the stopper cover limiting plate 4932 and the stopper cover body 4931 are preferably integrally formed, so as to enhance the connection strength between the stopper cover body 4931 and the stopper cover limiting plate 4932. The stop cover limiting plate 4932 is provided with a through hole for the stop cover connecting rod 4942 to pass through, the through hole can be positioned at the center of the stop cover limiting plate 4932, and the through hole is in clearance fit with the stop cover connecting rod 4942, so that the stop cover connecting rod 4942 is inserted into the through hole and can vertically slide.

Further, the limit stop block 4941 is disposed in the limit stop housing 4931, and the limit stop block 4941 is fixedly connected to one end of the limit stop connecting rod 4942. It is understood that the limit stop block 4941 and the limit stop connecting rod 4942 may be an integral structure to improve the connection strength between the limit stop connecting rod 4942 and the limit stop block 4941; the frame is prevented from being separated from the limit stop connecting rod 4942 and the limit stop block 4941 in the lifting process, so that the reliability in the lifting process is affected.

In order to improve the reliability of the lifting process, a first inclined plane is disposed at the connection between the stop cover limiting plate 4932 and the stop cover body 4931, and the first inclined plane is located at the inner side of the stop cover 493, i.e. the first inclined plane can be regarded as a part of the inner surface of the stop cover 493. The side of the limit stop block 4941 facing the limit plate 4932 of the limit cover is provided with a second inclined plane, the second inclined plane is matched with the first inclined plane, and when the limit stop block 4941 is lifted up and is abutted against the limit plate 4932 of the limit cover, the first inclined plane is attached to the second inclined plane; acting force acting between the first inclined plane and the second inclined plane can enable the first inclined plane and the second inclined plane to be better attached, and stability of the limit stop block 4941 and the limit stop cover 493 in the lifting process is improved.

In order to facilitate the mounting of the air spring 49 to the frame based on the above-described embodiments, the air spring 49 provided in this embodiment further includes an under-spring cover 497, the under-spring cover 497 being located on a side of the flat rubber stack 495 remote from the air bag 492, the under-spring cover 497 being bolted to the frame to mount the air spring 49 to the frame. It can be understood that the air spring 49 includes an upper spring cover 491, an air bag 492, a flat rubber stack 495 and a lower spring cover 497, which are sequentially arranged, and the upper spring cover 491, the air bag 492, the flat rubber stack 495 and the lower spring cover 497 form an integral structure, so that the structural strength of the air spring 49 and the tightness of the air bag 492 can be enhanced; at the same time, the mounting efficiency of the air spring 49 is also improved.

Further, the lower spring cover 497 is further provided with a positioning pin, and the positioning pin is located at one side of the lower spring cover 497 away from the flat rubber stack 495, and the positioning pin and the lower spring cover 497 can form an integrated structure, so as to enhance the connection strength between the lower spring cover 497 and the positioning pin. The frame is provided with a plug-in hole that mates with the locating pin, and when the locating pin is plugged into the plug-in hole of the frame, the spring lower cover plate 497 can be attached to the upper surface of the frame and fastened together by bolts. By the arrangement, the positioning precision between the air spring 49 and the framework can be improved, and the acting force of the air spring 49 can be vertically acted on the framework, so that the vibration reduction effect of the air spring 49 is ensured.

On the basis of the technical scheme, the bogie further comprises a steering driving device. The steering driving device is connected with the wheels and is used for driving the wheels to steer relative to the corresponding axles. The number of the steering driving devices is two, and the steering driving devices are respectively connected with the wheels on the two axles and are used for driving the corresponding wheels to steer, and the two wheels on the same axle steer synchronously.

The steering drive device includes: a steering driving part and a steering transmission part. The steering transmission part is connected between the wheels and the steering driving part and is used for transmitting steering power provided by the steering driving part to the wheels.

The transmission part includes: power steering swing arm, track rod, wheel steering swing arm and track rod. The first end of the power steering swing arm is connected with the output end of the steering driving part, and the power steering swing arm can rotate in a vertical plane by taking the first end as a center. The longitudinal tie extends in a direction perpendicular to the axle, and a first end of the longitudinal tie is hinged with a second end of the power steering swing arm. The wheel steering swing arm is fixedly connected with the wheel and is provided with a first sub swing arm and a second sub swing arm, and the first sub swing arm is hinged with the second end of the longitudinal pull rod. The transverse pull rod extends along the direction parallel to the axle, and two ends of the transverse pull rod are respectively hinged with a second sub-swing arm in the wheel steering swing arms corresponding to the two wheels.

When the bogie is a trailer bogie, the wheel steering swing arm is called a trailer steering swing arm, the first sub-swing arm is called a first trailer sub-swing arm, and the second sub-swing arm is called a second trailer sub-swing arm.

Fig. 19 is an exploded view of the steering drive and axle connection of the truck provided herein. As shown in fig. 1 and 19, the steering drive device includes a first steering drive device 481 connected to the first frame 41 and a second steering drive device 482 connected to the second frame 43. The first steering drive 481 is coupled to the first trailer wheel 4201 for rotating the first trailer wheel 4201; the second steering drive 482 is coupled to the second trailer wheel 4401 for rotating the second trailer wheel 4401.

In the bogie provided in this embodiment, the first frame 41 and the second frame 43 are hinged, and the first steering driving device 481 is used to control the rotation of the first trailer wheel 4201, and the second steering driving device 482 is used to control the rotation of the second trailer wheel 4401, so that the steering of the first vehicle body connected with the first frame 41 and the steering of the second vehicle body connected with the second frame 43 can be controlled relatively independently, which is beneficial to reducing the turning radius of the vehicle, facilitating the driving of the vehicle, and improving the flexibility of driving on urban roads.

Specifically, the first steering drive device 481 of the present embodiment includes a first drive portion for providing steering power and a first transmission portion; the first transmission portion connects the first drive portion and the first trailer wheel 4201, and is configured to transmit steering power provided by the first drive portion to the first trailer wheel 4201.

The second steering drive 482 includes a second drive portion for providing steering power and a second transmission portion; the second transmission portion connects the second driving portion and the second trailer wheel 4401, and is configured to transmit steering power provided by the second driving portion to the second trailer wheel 4401.

The first driving part comprises a first servo motor 4811 and a first power steering gear 4812; the first servo motor 4811 is in communication connection with the controller to realize automatic steering, and the first servo motor 4811 is used for outputting steering force; the first power steering gear 4812 is used for changing the direction of the steering force output by the first servo motor 4811 so as to provide steering power for the first transmission part, the first power steering gear 4812 is connected with the output end of the first servo motor 4811 through a first coupling 4813, and the output end of the first power steering gear 4812 is connected with the first transmission part.

The second driving part comprises a second servo motor 4821 and a second power steering gear 4822, the second servo motor 4821 is in communication connection with the controller to realize automatic steering, and the second servo motor 4821 is used for outputting steering force; the second power steering gear 4822 is used for changing the direction of the steering force output by the second servo motor 4821 so as to provide steering power for the second transmission part, the second power steering gear 4822 is connected with the output end of the second servo motor 4821 through a second coupling 4823 joint, and the output end of the second power steering gear 4822 is connected with the second transmission part.

In one possible implementation, the first transmission portion of the present embodiment includes a first power steering swing arm 4814, a first track rod 4815, a first trailer steering swing arm 4816, and a first track rod 4817, a first end of the first power steering swing arm 4814 being coupled to an output end of the first power steering gear 4812; the first end of the first track rod 4815 is connected to the second end of the first power steering swing arm 4814; the first trailer steering swing arm 4816 is fixedly connected with the first trailer wheel 4201, the first trailer steering swing arm 4816 comprises a first body, a first trailer sub swing arm 48161 and a second trailer sub swing arm 48162 which are connected with the first body, the first body is fixedly connected with the first trailer wheel 4201, the first trailer sub swing arm 48161 and the second trailer sub swing arm 48162 are both connected with the first body, an included angle is formed between the first trailer sub swing arm 48161 and the second trailer sub swing arm 48162, and the second end of the first longitudinal pull rod 4815 is connected with the first trailer sub swing arm 48161; two ends of the first tie rod 4817 are respectively connected with the second trailer sub-swing arms 48162 on the two first trailer steering swing arms 4816.

The second transmission part of the present embodiment includes a second power steering swing arm 4824, a second track rod 4825, a second trailer steering swing arm 4826, and a second track rod 4827, where a first end of the second power steering swing arm 4824 is connected to an output end of the second power steering gear 4822; the first end of the second track rod 4825 is connected to the second end of the second power steering swing arm 4824; the second trailer steering swing arm 4826 is fixedly connected with the second trailer wheel 4401, the second trailer steering swing arm 4826 comprises a second body and a third trailer sub swing arm 48261 and a fourth trailer sub swing arm 48262 which are connected with the second body, the second body is fixedly connected with the second trailer wheel 4401, the third trailer sub swing arm 48261 and the fourth trailer sub swing arm 48262 are both connected with the second body, an included angle is formed between the third trailer sub swing arm 48261 and the fourth trailer sub swing arm 48262, and the second end of the second longitudinal pull rod 4825 is connected with the third trailer sub swing arm 48261; the second tie rod 4827 has two ends respectively connected to the fourth trailer sub-swing arms 48262 on the two second trailer steering swing arms 4826.

The present embodiment may meet the need for different limit deflection angles of the first trailer wheel 4201 when traversing a curve by adjusting the lengths of the first track rod 4815 and the first track rod 4817 and the angle between the first and second trailer sub swing arms 48161, 48162. Similarly, the different requirements for the deflection angle of the second trailer wheel 4401 when the curve is traversed can be met by adjusting the lengths of the second track rod 4825 and the second track rod 4827 and the angle between the third and fourth trailer sub-swing arms 48261, 48262.

When the steering driving device of the embodiment is used, the first servo motor 4811 receives the steering input signal transmitted by the controller and outputs the steering torque, the steering torque output by the first servo motor 4811 is transmitted to the first power transmission device through the first coupling 4813, the first power transmission device outputs the rotating torque to drive the first power steering swing arm 4814 to swing, the first power steering swing arm 4814 transmits the rotating torque to the first trailer steering swing arm 4816 through the first track rod 4815, and the first trailer steering swing arm 4816 is fixedly connected with the first trailer wheels 4201, and the two first trailer steering swing arms 4816 are connected through the first track rods 4817, so that the two first trailer wheels 4201 can be driven to move synchronously and deflect.

Similarly, the second servo motor 4821 receives the steering input signal transmitted by the controller and outputs steering torque, the steering torque output by the second servo motor 4821 is transmitted to the second power transmission device through the second coupling shaft 4823, the second power transmission device outputs the rotating torque to drive the second power steering swing arm 4824 to swing, the second power steering swing arm 4824 transmits the rotating torque to the second trailer steering swing arm 4826 through the second longitudinal pull rod 4825, and the second trailer steering swing arm 4826 is fixedly connected with the second trailer wheels 4401 and the two second trailer steering swing arms 4826 are connected through the second transverse pull rod 4827, so that the two second trailer wheels 4401 can be driven to synchronously move and deflect.

In addition, the present embodiment further includes a first mounting seat 4818, where the first mounting seat 4818 is used for connecting with a first vehicle body; the first servomotor 4811 and the first power steering 4812 are both disposed on the first mount 4818. The first mounting seat 4818 is provided with a first limit switch 4819, and the first limit switch 4819 is arranged on one side of the first mounting seat 4818 facing the first track rod 4815. When the first track rod 4815 contacts the first limit switch 4819, the first limit switch 4819 generates a signal and feeds back to the controller, which will instruct the first power transmission to stop moving in that direction.

The present embodiment further includes a second mounting seat 4828, where the second mounting seat 4828 is used for connecting to a second vehicle body; the second servo motor 4821 and the second power steering 4822 are both disposed on the second mount 4828. The second mounting seat 4828 is provided with a second limit switch 4829, and the second limit switch 4829 is arranged on one side of the second mounting seat 4828 facing the second longitudinal pull rod 4825. When the second track rod 4825 contacts the second limit switch 4829, the second limit switch 4829 generates a signal and feeds back to the controller, and the controller sends out an instruction to stop the second power transmission to continue to act in the direction.

On the basis of the technical scheme, clamping fixing holes are respectively formed in the two frame bodies, and the clamping fixing holes in the two frame bodies are used for inserting two ends of a clamping tool and fixing the relative positions of the two frame bodies; the length of the clamping tool is fixed.

Specifically, fig. 20 is a schematic structural diagram of the clamping device provided in the present application, and fig. 21 is a usage state diagram of the clamping device shown in fig. 20. As shown in fig. 20 and 21, the present embodiment provides a clamping device for fixing a bogie, preventing the bogie from rotating during transportation and lifting. Wherein, the first frame 41 is provided with a first clamping fixing hole, and the second frame 43 is provided with a second clamping fixing hole. In use, the two ends of the clamping device 52 are inserted into the first clamping fixing hole and the second clamping fixing hole respectively to relatively lock and fix the first frame 41 and the second frame 43, thereby preventing relative rotation.

In an alternative embodiment, the clamping device 51 includes a first fixing lever 511, a second fixing lever 512, and a connecting lever 513.

The first end of the first fixing rod 511 is configured to be inserted into the first clamping fixing hole, that is, the first end of the first fixing rod 511 can be inserted from one side of the first clamping fixing hole and extend from the other side of the first clamping fixing hole, and the first fixing portion is configured to be relatively fixed with the first frame 41 after being matched with the first fastening piece. That is, the present embodiment may maintain the first fixing lever 511 in a relatively fixed state with the first frame 41 by the first fixing portion.

The first end of the second fixing rod 512 is used for being inserted into the second clamping fixing hole, that is, the first end of the second fixing rod 512 can be inserted from one side of the second clamping fixing hole and extend out from the other side of the second clamping fixing hole, and the second fixing portion is used for being relatively fixed with the second frame 43 after being matched with the second fastening piece. That is, the present embodiment may maintain the second fixing rod 512 in a relatively fixed state with the second frame 43 by the second fixing portion.

The two ends of the connection rod 513 are connected to the second end of the first fixing rod 511 and the second end of the second fixing rod 512, respectively. That is, in this embodiment, the first fixing rod 511 and the second fixing rod 512 may be connected into a whole through the connecting rod 513, and since the first frame 41 and the first fixing rod 511 may be relatively fixed and the second frame 43 and the second fixing rod 512 may be relatively fixed, the first frame 41 and the second frame 43 may be kept relatively fixed through the connection of the connecting rod 513 on the premise that the first frame 41 and the first fixing rod 511 are relatively fixed and the second frame 43 and the second fixing rod 512 are relatively fixed.

As can be seen from the above description, the clamping device 51 of the present embodiment can be matched with the fixing hole on the trailer bogie, so as to fix the hinged portion of the trailer bogie relatively, thereby achieving the purpose of preventing the trailer bogie from rotating during transportation and assembly and protecting the trailer bogie.

In one implementation manner, the surface of the first fixing portion may be provided with external threads, and the first fastening member may be a nut with internal threads, and the nut is abutted against the surface of the first frame 41 through cooperation of the threads and the nut, so that the first fixing rod 511 and the first frame 41 are relatively fixed;

similarly, the surface of the second fixing portion may be provided with external threads, and the second fastening member may be a nut with internal threads, and the nut is abutted against the surface of the second frame 43 through the cooperation of the threads and the nut, so as to fix the second fixing rod 512 and the second frame 43 relatively.

In another implementation manner, the first fixing portion may be provided with a first through hole, an axis of the first through hole is perpendicular to an axis of the first fixing rod 511, the first fastener is a shaft pin capable of extending into the first through hole, after the first fixing portion passes through the first clamping fixing hole, the shaft pin may be inserted into the first through hole so as to be abutted against the surface of the first frame 41 by using the shaft pin, so that the first fixing rod 511 and the first frame 41 are relatively fixed;

similarly, a second through hole may be formed in the second fixing portion, an axis of the second through hole is perpendicular to an axis of the second fixing rod 512, the second fastener is a shaft pin capable of extending into the second through hole, and after the second fixing portion passes through the second clamping fixing hole, the shaft pin may be inserted into the second through hole so as to be abutted against the surface of the second frame 43 by using the shaft pin, so that the second fixing rod 512 and the second frame 43 are relatively fixed.

In still another implementation manner, the first fixing portion may be an elastic portion, where the elastic portion includes a plurality of claws disposed at an end of the first fixing portion facing away from the first fixing lever 511, and the plurality of claws are equally spaced apart from each other in the same circumferential surface. When the first fixing part is in a compressed state, the outer diameter of the clamping jaw is smaller than the inner diameter of the first clamping fixing hole, so that the first fixing part passes through the first clamping fixing hole; when the first fixing part is in a natural state, the outer diameter of the clamping claw is larger than the inner diameter of the first clamping fixing hole, and the clamping claw is abutted against the surface of the first frame body 41 so that the first fixing part and the first frame body 41 are relatively fixed;

similarly, the second fixing portion is an elastic portion, and a plurality of claws are disposed on a side of the second fixing portion facing away from the second end of the second fixing rod 512, and the plurality of claws are equally spaced apart from each other in the same circumferential surface. When the second fixing part is in a compressed state, the outer diameter of the clamping claw is smaller than the inner diameter of the second clamping fixing hole, so that the second fixing part passes through the second clamping fixing hole; when the second fixing portion is in a natural state, the outer diameter of the claw is larger than the inner diameter of the second clamping fixing hole, and the claw abuts against the surface of the second frame body 43 so that the second fixing portion and the second frame body 43 are relatively fixed.

Through the three implementation manners, it can be seen that the clamping device 51 provided by the embodiment can be quickly assembled and disassembled with the bogie body of the trailer, is convenient for the use of staff, and is beneficial to improving the working efficiency.

It should be noted that the above only shows three possible implementation manners, and it is clear to those skilled in the art that other possible fixing manners may be used to fix the fixing rod with the corresponding frame body, which is not limited in this embodiment.

The first fixing rod 511 of this embodiment is further provided with a first boss 514, where the first boss 514 is disposed near the first fixing portion, the diameter of the first boss 514 is greater than the inner diameter of the first clamping fixing hole, the first boss 514 is used to abut against one side of the first clamping fixing hole, and the first fixing portion abuts against the other side of the first clamping fixing hole, so that the stability of connection can be improved;

similarly, the second fixing rod 512 of this embodiment is further provided with a second boss 515, where the second boss 515 is disposed near the second fixing portion, the diameter of the second boss 515 is greater than the inner diameter of the second clamping fixing hole, the second boss 515 is used to abut against one side of the second clamping fixing hole, and the second fixing portion abuts against the other side of the second clamping fixing hole, so that the stability of connection can be improved.

Further, in order to enhance the strength of the chucking device 51, the present embodiment further includes a first reinforcing bar 516 and a plurality of second reinforcing bars 517. The first fixed rod 511 and the second fixed rod 512 are connected to both ends of the first reinforcing rod 516, the first reinforcing rod 516 is close to the second end of the first fixed rod 511 and the second end of the second fixed rod 512, and strength of the clamping device 51 in the axial direction of the connecting rod 513 can be improved by arranging the first reinforcing rod 516. The first reinforcing rod 516 and the connecting rod 513 are respectively connected to both ends of the second reinforcing rod 517, and the strength of the chucking device 51 in the axial direction of the first fixing rod 511 can be improved by providing the second reinforcing rod 517. The first reinforcing bars 516 may be parallel to the connecting bars 513 such that the lengths of the respective second reinforcing bars 517 are equal for ease of installation and manufacture.

In addition, the first fixing rod 511, the second fixing rod 512 and the connecting rod 513 of the present embodiment may also be formed in an integrally formed manner, so as to further improve the overall strength of the clamping device 51.

Fig. 22 is a schematic structural view of another clamping device provided in the present application, fig. 23 is a sectional view of fig. 22, and fig. 24 is a use state view of the clamping device shown in fig. 22. As shown in fig. 22 to 24, the present embodiment provides another chucking device.

The first and second clamping fixing holes may be provided on the first and

second axles

42 and 44, respectively, and the clamping device 52 includes a first and second fixing bars 521 and 522.

The first end of the first fixing rod 521 is inserted into the first chucking fixing hole. Alternatively, the first clamping fixing hole may be a threaded hole. The first end of the first fixing rod 521 may be provided with an external thread, and the first end of the first fixing rod 521 is directly screw-fixed in the first clamping fixing hole to lock and fix the first fixing rod 521 with the first axle 42.

The first end of the second fixing rod 522 is inserted into the second chucking fixing hole. Alternatively, the second clamping fixing hole may be a threaded hole. The first end of the second fixing rod 522 may be provided with external threads, and the first end of the second fixing rod 522 is directly screwed into the second clamping fixing hole, so as to fix the second fixing rod 522 and the second axle 44 in a locking manner.

The second end of the first fixing rod 521 is connected to the second end of the second fixing rod 522 by a telescopic mechanism for adjusting the length of the chucking device 52. That is, the present embodiment can adjust the interval length between the first fixing lever 521 and the second fixing lever 522 through the telescopic mechanism, thereby enabling the chucking device 52 to be adapted to various sizes of trailer bogies and facilitating the installation and removal of the chucking device 52. The overall clamping device 52 can be made smaller in size by shortening the spacing between the first 521 and second 522 fixing bars prior to installation, thereby facilitating installation onto the trailer bogie; during installation, the telescopic mechanism can be adjusted after one end of the clamping device 52 is fixed to enable the clamping device 52 to stretch, so that two ends of the clamping device 52 are respectively fixed with the first axle 42 and the second axle 44, and the effect of clamping and fixing the trailer bogie is achieved.

As can be seen from the above description, the clamping device 52 of the present embodiment can be matched with the fixing hole on the bogie, so as to fix the hinged portion of the trailer bogie relatively, thereby achieving the purpose of preventing the rotation of the trailer bogie during transportation and assembly and protecting the trailer bogie.

In one possible implementation, the telescopic mechanism comprises a fixed shaft 523, wherein the outer surface of the fixed shaft 523 is provided with external threads, and the external threads of the first end of the fixed shaft 523 are opposite in screwing direction to the external threads of the second end of the fixed shaft 523; the second end of the first fixing rod 521 is provided with a first shaft hole with internal threads, the second end of the second fixing rod 522 is provided with a second shaft hole with internal threads, the first end of the fixing shaft 523 is in threaded connection with the first shaft hole, and the second end of the fixing shaft 523 is in threaded connection with the second shaft hole.

The telescopic mechanism further comprises a first locking member, the first locking member comprises a first locking nut 524 and a second locking nut 525, the first locking nut 524 is sleeved at the first end of the fixed shaft 523, and the second locking nut 525 is sleeved at the second end of the fixed shaft 523.

When the clamping device 52 of the present embodiment is used, the components of the clamping device 52 are connected in sequence, and the fixed shaft 523 is adjusted to make the overall length of the clamping device 52 be in a proper range, so that the clamping device 52 is easy to be placed between the first axle and the second axle, and too many gaps are not left. The first fixing rod 521 is then inserted into the first chucking fixing hole and fixed to the first axle, and the fixing shaft 523 is adjusted such that the second fixing rod 522 is inserted into the second chucking fixing hole. Finally, the fixing shaft 523 is adjusted to make the lengths of the clamping devices 52 at the two sides consistent, and the first locking nut 524 and the second locking nut 525 are twisted to complete the installation.

When the first locking nut 524 and the second locking nut 525 are loosened, the second fixing rod 522 is detached from the second axle, the fixing shaft 523 is adjusted to enable the clamping device 52 to be taken out, and finally the first fixing rod 521 is detached from the first axle, so that the whole clamping device 52 is taken down.

In another implementation mode, the telescopic mechanism comprises a sleeve and a screw rod, wherein an inner thread matched with the screw rod is arranged on the inner wall of the sleeve, the screw rod is in threaded connection with the sleeve, and the length of the telescopic mechanism is adjusted by rotating the sleeve.

Alternatively, the sleeve may be fixed to the second end of the first fixing rod 521 or the second end of the second fixing rod 522; correspondingly, the lead screw may be fixed at the second end of the second fixing rod 522 or the second end of the first fixing rod 521.

Further, the implementation mode further comprises a second locking piece, wherein the second locking piece is used for locking or unlocking the sleeve and the screw rod relatively. Optionally, a first through hole may be formed in the sleeve, and a plurality of first clamping fixing holes may be formed in the screw in an axial direction, and the second locking member may be fixed in the first clamping fixing holes after passing through the first through hole, so that the sleeve and the screw are locked relatively. In this embodiment, the second locking member may be a bolt, and the first clamping fixing hole may be a threaded hole.

In yet another implementation, the telescoping mechanism includes a fixed sleeve and a sliding sleeve that is sleeved outside the fixed sleeve and moves along the fixed sleeve, and adjustment of the telescoping mechanism length is achieved by sliding the sliding sleeve.

Optionally, a fixing sleeve is fixed at the second end of the first fixing rod 521 or the second end of the second fixing rod 522; correspondingly, the sliding sleeve is fixed at the second end of the second fixing rod 522 or the second end of the first fixing rod 521.

Further, the implementation mode further comprises a third locking piece, and the second locking piece is used for locking or unlocking the fixed sleeve and the sliding sleeve relatively. Optionally, a second through hole is formed in the sliding sleeve, a plurality of second clamping fixing holes are formed in the fixing sleeve along the axial direction, and the third locking piece can be fixed in the second clamping fixing holes after penetrating through the second through hole so that the fixing sleeve and the sliding sleeve are locked relatively. In this embodiment, the third locking member may be a bolt, and the second clamping fixing hole may be a threaded hole.

Further, in this embodiment, the first end of the first fixing rod 521 is further provided with a first hanging plate 526, and the first hanging plate 526 is provided with a first hanging hole; the first end of the second fixing rod 522 is further provided with a second hanging plate 527, and the second hanging plate 527 is provided with a second hanging hole. Wherein, the first hanging plate 526 is fixedly connected with the first fixing rod 521, and the second hanging plate 527 is fixedly connected with the second fixing rod 522; the first and

second hanging plates

526 and 527 each have a certain thickness to meet the requirement of hanging strength.

Claims

1. A bogie, comprising:

one end of the traction device is connected with the axle, and the other end of the traction device is connected with the vehicle body;

the suspension device is an air spring; the air spring includes: the device comprises a spring upper cover plate, an air bag, a flat rubber stack and a lifting assembly;

the air bag is respectively connected with the spring upper cover plate and the flat rubber stack, and the three are formed into a sealed cavity; the lifting assembly is arranged in the sealing cavity and comprises a limit stop cover and a limit stop piece, the bottom of the limit stop cover is covered on the flat rubber pile, and a gap is reserved between the top of the limit stop cover and the spring upper cover plate;

the limit stop piece comprises a limit stop connecting rod and a limit stop block positioned at one end of the limit stop connecting rod, a through hole is formed in the top of the limit stop cover, one end, far away from the limit stop block, of the limit stop connecting rod penetrates through the through hole to be connected with the spring upper cover plate, the limit stop block is positioned in the limit stop cover, moves in the limit stop cover and can be abutted with the top of the limit stop cover and the flat plate rubber stack;

The limit stop cover comprises a stop cover body, stop cover limit plates and stop cover mounting edges, wherein the stop cover limit plates and the stop cover mounting edges are positioned at two ends of the stop cover body;

the stop cover body is provided with a bottom end opening and a top end opening, the stop cover mounting edge is circumferentially arranged along the bottom end opening and positioned at the outer side of the stop cover body, and the stop cover mounting edge is mounted on the flat rubber pile;

the stop cover limiting plate is installed at the top end opening, and the through hole is located on the stop cover limiting plate.

2. The bogie of claim 1, further comprising: the frame body buffer device is arranged on at least one frame body and used for buffering and stopping when the two frame bodies are in rotary contact.

3. The bogie of claim 1, further comprising: and the steering driving device is connected with the wheels and is used for driving the wheels to steer relative to the corresponding axles.

4. A bogie according to claim 2 wherein the two frames are connected by a slewing bearing;

the rotary supporting device comprises a first rotating body and a second rotating body which can rotate in the horizontal plane, and the first rotating body and the second rotating body are respectively connected with the two frame bodies.

5. The bogie of claim 4, wherein the frame body is provided with a stepped hole and forms a stepped surface;

the first rotating body and the second rotating body are arranged up and down, and the second rotating body is fixed on the step surface of one of the frame bodies;

the bottom of the first rotating body is embedded in the second rotating body, and the top of the first rotating body protrudes out of the second rotating body and is fixed on the step surface of the other frame body.

6. The bogie of claim 5, wherein the slewing bearing further comprises:

the rotary support cover plate is arranged on the frame body and seals the first step hole.

7. The bogie of claim 6, wherein a waterproof pad is disposed between the swing support cover plate and the lower frame body, and an elastic pin extending in a vertical direction is disposed between the swing support cover plate and the lower frame body, and the elastic pin is fixed to the frame body through the waterproof pad.

8. The bogie according to claim 2, wherein two frame buffer devices are arranged on the frame, the two frame buffer devices are symmetrically arranged on two sides of the frame, and the symmetry axis is perpendicular to the axle;

the frame body buffer device includes:

The buffer block mounting seat is fixed on the frame body;

the buffer block is fixed on the buffer block mounting seat; buffer blocks on the same side of the two frame bodies are arranged in opposite directions; when the two axles are parallel, the buffer blocks positioned between the same sides of the two frame bodies are not contacted; when the two frames rotate relative to each other by a preset angle, the buffer blocks on the same side of the two frames with the rotation direction can be abutted.

9. The bogie of claim 8, wherein two sides of the frame body extend outwardly from buffer mount mounting arms for mounting buffer mount blocks; the buffer seat mounting arm and the extending direction of the frame body form a preset included angle.

10. The bogie of claim 4, wherein the frame body comprises: a frame body connecting part and a frame body hinging part; the frame body connecting part is connected between the axle and the frame body hinging part; the two sides of the horizontal direction of the frame body hinge part are symmetrically provided with frame body buffer devices; one end of the frame body hinge part far away from the frame body connecting part is connected with the first rotating body or the second rotating body.

11. The bogie of claim 10, wherein the frame body connecting portion has a trapezoidal structure, a long base thereof being connected to the axle, and a short base thereof being connected to the frame body hinge portion.

12. The bogie as claimed in claim 10, wherein one end of the frame hinge portion for connection with the frame connecting portion has a width larger than one end for hinge connection with another frame; the width of the frame body hinge part is gradually reduced along the direction from the axle to the frame body hinge part; the frame body hinge part is provided with a plurality of through holes which are penetrated up and down, and the side wall of the through hole facing the frame body connecting part is provided with a bolt hole of which the central line extends along the horizontal direction, so that the bolt hole is penetrated through by a bolt to be connected with the frame body connecting part.

13. The bogie of claim 1, wherein the axle comprises: a middle bridge section extending along the horizontal direction and end bridge sections formed by extending upwards from two ends of the middle bridge section along the vertical direction; the end bridge section is connected with the wheels, and a suspension device is arranged on the end bridge section.

14. The bogie of claim 13, wherein the traction device comprises:

two first traction assemblies disposed in parallel are connected to two end axle segments of the axle, respectively.

15. The bogie of claim 14, wherein the traction device further comprises:

two second traction assemblies respectively connected to intermediate axle segments of the axle; the second traction assembly has a first end and a second end along its length, wherein the first end is connected to the intermediate bridge section; the distance between the first ends of the two second traction assemblies is less than the distance between the second ends.

16. A bogie according to claim 3 wherein the number of steering drive means is two, each connected to a wheel on two axles for driving a respective wheel to steer;

two wheels on the same axle turn synchronously.

17. The bogie as claimed in claim 16, wherein the steering drive comprises: a steering driving part and a steering transmission part; the steering transmission part is connected between the wheels and the steering driving part and is used for transmitting steering power provided by the steering driving part to the wheels.

18. The bogie as claimed in claim 17, wherein the transmission portion comprises:

a power steering swing arm, a first end of which is connected with the output end of the steering driving part; the power steering swing arm can rotate in a vertical plane by taking the first end as a center;

the longitudinal pull rod extends along the direction perpendicular to the axle, and the first end of the longitudinal pull rod is hinged with the second end of the power steering swing arm;

the wheel steering swing arm is fixedly connected with the wheel; the wheel steering swing arm is provided with a first sub swing arm and a second sub swing arm, and the first sub swing arm is hinged with the second end of the longitudinal pull rod;

and the transverse pull rod extends along the direction parallel to the axle, and two ends of the transverse pull rod are respectively hinged with a second sub-swing arm in the wheel steering swing arms corresponding to the two wheels.

19. The bogie of claim 1, wherein the air spring further comprises a limit stop mounting plate;

the limit stop mounting plate is fixed on one side of the spring upper cover plate, which faces the limit stop cover;

the limit stop mounting plate is provided with a threaded hole for fixing the limit stop connecting rod, and one end, far away from the limit stop block, of the limit stop connecting rod is connected in the threaded hole.

20. The bogie according to claim 1, wherein a first inclined surface is provided at a connection of the stopper cover limiting plate and the stopper cover body, the first inclined surface being located inside the stopper cover;

a second inclined plane matched with the first inclined plane is arranged on one side of the limit stop block, which faces the limit plate of the stop cover; the first inclined surface can be abutted with the second inclined surface.

21. The bogie of claim 1, further comprising an underspring cover plate;

the lower spring cover plate is connected to one side, far away from the air bag, of the flat rubber stack and is used for being connected with a framework so as to fix the air spring on the framework.

22. The bogie according to claim 1, wherein a chucking fixing hole is provided on the frame body; the clamping fixing holes on the two frame bodies are used for inserting two ends of the clamping tool and fixing the relative positions of the two frame bodies; the length of the clamping tool is fixed.

23. The bogie according to claim 1, wherein the opposite sides of the two axles are respectively provided with clamping fixing holes with the same height; the clamping fixing holes on the two frame bodies are used for inserting two ends of the clamping tool, and the clamping tool is used for fixing the relative positions of the two frame bodies.

24. The bogie of claim 23, wherein the clamping tool comprises: the telescopic mechanism is connected between the first fixed rod and the second fixed rod; the first fixing rod and the second fixing rod are respectively inserted into clamping fixing holes on the two axles.

25. The bogie according to claim 6, wherein the top of the revolving support cover plate is provided with two through channel limiting bosses, and a limiting space for limiting the rotation of the through channel is formed between the two through channel limiting bosses; the through channel is a connecting channel between two car bodies.

26. The bogie of claim 1, wherein the axle is further provided with a height valve stem mount for mounting a height valve stem for detecting the height of the air spring.

27. A rubber wheel train, comprising: at least two bodyworks, between which the bogie as claimed in any one of claims 1 to 26 is connected.